Gny. Sgt. Hartman is a fictional character from the film Full Metal Jacket, directed by Stanley Kubrick. He is portrayed by actor R. Lee Ermey, who was a former U.S. Marine Corps drill instructor. Hartman is known for his strict and often harsh training methods, which he uses to prepare recruits for combat during the Vietnam War. The character is emblematic of military training and discipline, showcasing the psychological and physical challenges faced by new soldiers. His memorable quotes and commanding presence have made him an iconic figure in film history, representing the tough love approach of military instructors.